SCAT Modern Muscle Engine Rotating Assembly Kit

Fits Chrysler, Dodge, Jeep, Ram 5.7L Hemi, 6.1L SRT8, 6.4L 392, 6.2L Hellcat & Trackhawk

1-48500BI

Overview:

The SCAT Modern Muscle Engine Rotating Assembly Kit is a precision-engineered solution designed for enthusiasts and professional builders seeking to upgrade or rebuild their Chrysler, Dodge, Jeep, or Ram Hemi engines. This kit fits a broad range of popular Hemi engines including the 5.7L, 6.1L SRT8, 6.4L 392, and the high-performance 6.2L Hellcat and Trackhawk variants. It provides a balanced, forged rotating assembly that enhances engine durability and performance potential.

Ideal for those looking to build a reliable, high-strength bottom end, this kit delivers the core components necessary for a robust foundation, allowing for future power upgrades and long-term engine health. It is perfect for street performance, muscle car restorations, and track-focused builds.

Key Features:

This rotating assembly kit combines premium materials and expert craftsmanship to ensure optimal strength and reliability. Key features include:

• Forged 4340 steel crankshaft, known for exceptional toughness and fatigue resistance
• Forged aluminum flat-top pistons with two valve reliefs and +2.00cc piston head volume for improved combustion efficiency
• Forged 4340 steel I-beam connecting rods with a 6.125-inch center-to-center length for superior strength and stability
• Balanced rotating assembly for smooth operation and reduced vibration
• Plasmamoly piston rings included for enhanced wear resistance and sealing
• Stock size rod and main bearings included for precise fitment
• Floating wrist pins for reliable piston articulation
• Rear main seal style: 1-piece for simplified installation and leak prevention
• Engine displacement: 6.0L / 368 cubic inches, compatible with multiple Hemi engine variants

Construction & Design:

SCAT’s rotating assembly kit is built with high-grade forged materials to withstand the rigors of high-performance applications. The crankshaft and connecting rods are crafted from forged 4340 steel, a material prized for its strength and durability under extreme stress. The pistons are forged aluminum, providing a lightweight yet robust design that reduces reciprocating mass and improves throttle response.

The flat-top piston design with valve reliefs optimizes combustion chamber shape, contributing to efficient power delivery and engine longevity. Each component is precision balanced internally to ensure smooth engine operation and reduce wear on bearings and other moving parts.

Installation & Fitment:

This kit is designed as a direct fit for most Chrysler, Dodge, Jeep, and Ram Hemi engines within the 5.7L to 6.4L displacement range, including the 6.1L SRT8 and 6.2L Hellcat models. Installation requires standard engine assembly procedures and is best performed by experienced engine builders or professional shops. No modifications to the block or external components are typically necessary, but proper torque specifications and clearances should be observed during assembly.

What's Included:

• Forged 4340 steel crankshaft
• Forged aluminum flat-top pistons with valve reliefs
• Forged 4340 steel I-beam connecting rods
• Piston rings with plasmamoly facing
• Rod bearings (stock size)
• Main bearings (stock size)

Ideal For:

This SCAT rotating assembly kit is ideal for muscle car enthusiasts, performance builders, and professional engine shops aiming to rebuild or upgrade modern Hemi engines. It suits applications ranging from street performance and muscle car restoration to moderate track use, providing a strong foundation for increased power and reliability.

SCAT Crankshafts is part of the enthusiast aftermarket, offering components and accessories tailored to drivers who demand more from their vehicles. Their catalog supports everything from maintenance refreshes to performance-oriented upgrades, with a focus on quality and compatibility across popular platforms. If you’re building for the street with an eye toward track performance, SCAT Crankshafts is a solid option.